In 1998 powershift transmission became available, a radiator with tilt away oil cooler was added, and modifications were made to the torque limiter, beginning with 1ER00364, 1NR00454, 1ZR00426, 7WN00439, 1CR00391, 1MR00456, 1YR00517, and 6XN01245. An emission certified engine was added, beginning with 1ER00364, 1NR00454, 1ZR00427, 7WN00444, 1CR00370, 1MR00457, 1YR00584, and 6XN01443. An air suspension seat was added, beginning with 1CR00385, 1MR00463, 1YR00645, and 6XN01645.